Portable lathe.



PORTABLE LATHE. nrnmnlox Hmm 532113, mos. nnnnwnn lu 20, 1908.4

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G. A. ROSBNOW,` DEG'D.

H. ROSEKOW, ADMINISTRATBIX.

Patented Dec. 8, 1908.

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UNITED STATES PATENT OFFICE.

GUSTAVE A. ROSENOW, OF DULUTH, MINNESOTA; HELEN ROSENOW ADMINISTRATRIX OF SAID GUSTAVE A. ROSENOW, DEOEASED.

PORTABLE LATHE.

Specification of Letters Patent.

Patented Dec. 8, 1908.

Application filed. September 13, 1905, Serial No. 278,238. Renewed. May 20, 1908. Serial No. 433,936.

To all whom it may concem:

Be it known that I, GUsrAvE A. RosENow, a Citizen of the United States, and a resident of the city of Duluth, in the County of St. Louis and State of Minnesota, have invented certain new and useful Improvements inl Heretofore the satisfactory performancel of mechanical work such as described except at a machine shop has been diflicult in the extreme and usually the device for the purpose is so inadequate as to necessitate the transportation of the shaft to the machine shop or the factory where frequently are found massive special machines for. this class of work capable of affording reasonably satisfactory results. In most instances for economy of time and transportation charges it is desirable to carry the tool to the work instead of theb work to the tool and in that case the mechanical construction of the lathe or tool must be such as to enable the work to be acceptably performed. The construction should be as simple, Compact and strong as possible to insure precision of results and of lightweight and capable of being quickly knocked down to facilitate transportation. This also is important if the tool were used merely as a machine shop accessory.

The object of the invention is to provide a portable lathe adapted to rigidly support and center the pin crank or shaft to be operated upon and aiford perfect adjustability' to the part to be turned.

It is a further object to aiford a knock down lathe of the class described adapted to be very quickly assembled when required. for use.

It is also an object of the invention to afford a strong, simple Compact and very durable machine capable of Operation on shafts and pins of any size and yet of light weight and afi'ording cutting mechanism ini wheel 64 or any suitable means extend cluding a self feed therefor adapted to true the pin or shaft by revolving the cutting head without revolving the shaft-for pin.

Itis a further object of the invention to afford a strong, simple and positively op erating feed mechanism whereby the action of the tool is at all times under perfect and instantaneous control.

The invention consists in the matters hereinafter described and more fully pointed out and defined in the appended claims.

In the drawings: Figure 1 is a top plan viewv of a device embodying my invention showing the same partly broken, and with the centering stock removed. Fig. 2 is an end elevation of the same with the head stock broken away. Fig. 3 is a horizontal section of the head stock. Fig. 4 is a face view of a reinovable centering stock adapted to receive the shaft therethrough. Fig. 5 is a horizontal section of the carriage and the revolving cutter head therein. Fig. 6 is a front elevation partly broken taken on the feed side of the machine. Fig. 7 is an enlarged horizontal section of the feed mechanism taken below the drive shaft. Fig. 8 is an enlarged face view of one of the tool carriers showing the same removed from the machine. Fig. 9 is a top plan view of the same.` Fig. 10 is an enlarged detail section illust-rating ,one way of supporting the tools in place. Fig. 11 is an enlarged sectional detail of the connection of the feed shaft with the carriage. Fig. 12 is a transverse section of another form of cutter head.

As shown in the drawings: A, indicates cylindric ways of any desired length which are rigidly Secured 1n parallel relation by means of a removable head stock B, and a removable tail stock BC The head stock B comprises a rigid bar or beam a ertured at its ends to receive the ends o the Ways therein, which are slightly reduced in diameter for that purpose, and which are firmly secured in place by means of nuts b which eng'age in screw threads on said ends. Said head stock as` shown is provided centrally With a threaded aperture therethrough, parallel with the Ways and in which is engaged a threaded spindle b' shaped'at its outer end to afford means for turning the same. inwardly and at its inner end having a tapered aperture to receive a Center b2 of the usual or any suitable form.. As shown set screws Zfi, operated by a hand through the head stock into the central bore thereof andto-positivelyengage the spindle* holding the same in adjusted position. Slidably engaged on said ways is a tail stock B' before mentioned, the ends of which are apertured and slit longitudinally to afl'ord resiliency and are adapted to be sprung together in gripping relation upon the Ways by means of clamping bolts bs which engage in suitable bosses at the extremities of said tail stock. Centrally engaged in said tail stock and parallel with the Ways, is a spindle b corresponding with the spindle b' of the head stock, and in which is carried a center 217 adapted together with the center 62 to support the work in operative position. A set screw bs acts to hold the spindle in adjusted position as before described.

Slidable upon the Ways A is a carriage comprising a bar or beam C having a large circular Opening at its center in axial alinement with said centers, and in which is a revoluble cutter head D. As shown elongated sleeves c are slidably Secured on said ways between the head and tail stock, the central parts of which are turned to fit in circular apertures at the ends of the carriage C. A peripheral collar c' is provided on said sleeve against which one side of the carriage bears and a jam nut 02 is threaded on said sleeve and bears against the other side of the carriage, opposite said collar and firmly engages the ends of the carriage therebetween. Said carriage is divided vertically and centrally into equal parts rigidly bolted together as ,shown in F igs. l and 2 and a central peripheral groove 03 is provided in the wall of said central opening whereby the head is retained in place. As shown the head comprises a central worm gear D', the periphery of which eXtends into said groove and fits closely therein, and to which on each side are bolted annular plates bringing the surface of said rings and annular head flush with the outer side of the carriage as shown in F igs. 2 and 5. Said worm gear D' and the annular plates cl are each Constructed of two parts connected together by hooked joints CZ' to enable the head to be inserted on or removed from the work without removing the work from the machine.

If preferred the head may be Constructed as shown in Fig. 12 in which case the annular plates are omitted and the worm gear D2 extends the full width of the carriage and is separable as before described. Secured on said head and movable radially thereof is a tool carriage comprising a segment E having a rib e on the rear side thereof which fits in a complemental groove or recess e' in said head, and which together with bolts extending through the segment acts to rigidly secure the same in place upon the head. Integral with the segment and extending radially outward therefrom are parallel undercut guides 62 as shown in Figs. 8 and 9 and slidably engaged between the same is a tool carriage E' provided with a central radial groove adapted to engage the tool therein. Set screws 63 engage the tool in place, and a feed screw e* engages the tool carriage E' and is rotatively engaged in a collar on one of said guides and acts by its rotation to feed the tool inwardly or outwardly as preferred. As shown also a radial dove-tailed groove is provided in the annular facing plate (Z of the head in which engages a complemental tool of any preferred kind, which is rigidly engaged in place by one or more bolts e having their heads beveled complementally with the side of the tool and act to rigidly engage the tool in place as shown in Fig. 10. Obviously one or more tools may be used on one or both Sides on. said cutting head as necessity or convenience may require.

The carriage is fed along the ways and the head rotated either by hand or from any suitable source of power. For this purpose, as shown, a horizontal shaft F extends through and is journaled in the top of the carriage on suitable bearings and on a bracket f extending longitudinally of the carriage and is provided on its outer end with a pulley f having a handle fs therein whereby the shaft may be rotated by means of a motor or manually. At its inner end a worm f2 is Secured on said shaft which meshes with the worm gear 03 within the head.

As shown an adjusting bolt f3 is secured in the carriage and bears against the inner end of said shaft at its extremity acting as an adjustable thrust bearing.

A screw shaft G having at its outer end a hand wheel 9 or other means for rotating the same is journaled in a suitable bearing sleeve 9 on the end of the head stock and .extends through, and has threaded engagement with a sleeve 92 journaled in the bracket f on the carriage. Said sleeve is provided at one end with a gear 93 and at the other end with a nut 94 whereby said sleeve though free to rotate within the bracket is held from longitudinal movement therein. Also journaled on the bracket f, is a worm gear G' which meshes with a worm F' on the shaft F. Rigidly connected with said worm gear is a pinion 9 which intermeshes with a pinion 9G journaled on said bracket and which intermeshes with a pinion 97, likewise journaled thereon and rigidly connected therewith is a pinion 98 in alinement with the gear 93. Pivoted on the same shaft with the gear 97 and 98 is a frame G2 having journaled therein a gear 99 which intermeshes with the pinion 98 and the gear 93 when feeding the carriage forwardly. A reversing gear 910 is ournaled in said frame and intermeshes With the gear 99 and is adapted also to intermesh with thegear 93, when the frame G2 is swung downwardly a sufiicient distance to bring the gear g out of mesh With the pinion gg and the gear g into mesh with said gear 93. As shown a rigid arm gu, extends upwardly tora point of engagenient with the bearing, and is provided with a slotted segment g adapted for manual engagement and through which eX- tends a set screw 913 or any suitable means for securing thesegment in place.

The Operation is as follows: WVhen in use the Ways may be supported horizontally in any suitable manner in parallel relation and the shaft crank or pin to be operated upon such as indicated in dotted lines in Fig. 1 is engaged between and supported upon the centers b2 b7 With the pin or other part it is desired to turn extending through the carriage and head. The tools are then adjusted to the desired depth of cut and the appropriato gear or pinion go is thrown in mesh with the gear 93. Rotation of the shaft F manually or by means of a suitable motor driving to the belt wheel fi, acts to rotate the head and feed the carriage inwardly turning the part engaged through the head. Having reached the end of the cut the segment g is shifted on its set screw 913 and bringing the pinion g into engagement With the gear 93 thus reserving the movement of the carriage on the Ways. The carriage is thus driven back and forth along the Ways rapidly turning up the pin or shaft which of course remains stationary during the Operation.

The tool in the tool carriage E/ is adjusted inwardly or outwardly by means of a screw shaft 64. The tool E2 can readily be adjusted to any desired depth of out by slightly loosening the bolt e and tapping the tool inwardly into engagement With the metal after which the bolts are again tightened.

f a shaft of considerable length is to be operated upon as for instance in turning the shaft to aft'ord a coupling or journal, the center-.ing stock B2 shown in Fig. 4: may be secured on the Ways A either with or Without the tail stock B'. Or if the shaft is of such length that it is impossible to get at either end, two of said centering stocks may be employed one on each side of the head.

his centering stock comprises laterally directed arms apertured at the ends to be rigidly engaged on the Ways as described with reference to the tail stock B'. Said arms are rigidly bolted together atthe middle affording a large circular, central Opening and as shown a plurality of radially disposed set screws b extend into said central Opening to alford means for centering the shaft therein. If used in relation when turning a crank pin as shown in Fig. 1 the centering stock B2 is used in centering the shaft, and thus enabling a long support to be alforded for the shaft avoiding all tendencies to deflection which might otherwise effect the accuracy of the work.

Owing to the Simplicity and strength of the construction and the obvious adaptability of the same for being quickly knocked down for placing upon and removing from the Work and for transportation it is evident that the lathe is capable of use wherever the repairs may be required thus economizing in time and expense.

Any desired number of cutting tools may be used on one orboth sides of the head and the tools may be of any preferred kind or construction. I therefore do not purpose limiting this application for patent otherwise than necessitated by the prior art as many details of construction and arrangement may be varied without departing from the principle of my invention.

l claim as my invention:

l. In a machine of the class described the combination with parallel Ways and a carriage movable on said Ways of a rotative head in said carriage, a worm gear on the periphery thereof, a worm shaft journaled on the carriage, a worm thereon adapted to drive said head, a threaded shaft journaled on the head stock, a bracket on said carriage, a sleeve ournaled therein having threaded engagement with said threaded shaft, a worm gear on said bracket, a train of gears connecting the same and said sleeve, and a worm on said shaft adapted to intermesh With said worm gear thereby actuating said carriage When the rotative head is actuated.

2. In a device of the class described the combination with parallel cylindric Ways having one end thereof reduced, of a head stock rigidly engaged on said reduced ends, a tail. stock slidably engaged on said ways, alined centers on said head and tail stocks, a carriage comprising a bar having apertured ends, sleeves engaged in said ends and slidably engaged on said Ways, a rotative head in said carriage in axial alinement with said centers, a worm gear on the outer periphery thereof, a worm shaft journaled on the carriage, a worm thereon adapted to intermesh with said worm gear, a threaded shaft journaled on the head stock, a sleeve on the carriage having threaded engagement with said shaft, a gear thereon and gears driven by said Worm shaft and intermeshing With said gear and adapted to drive the carriage in either direction.

3. In a device of the class described the combination with parallel Ways, a carriage having a central bearing seat therein, sleeves in the ends of said carriage and slidably engaged on said Ways, a rotative head in said carriage, a worm gear on the outer periphery thereof, a Worm shaft adapted to drive gears into mesh With the gears on said sleeve said head, a shaft journaled on the head and Worin gear.

stock, a bracket rigidly engaged on said cari In testilnony Whereof I have hereunto sub riage, a sleeve journaled on the bracket and scribed iny name in the presence of two sub- 5 having` threaded engagement on said shaft, scrbing Wtnesses.

a Gear on said sleeve aworm (rear journaled oncthe bracket and driiven by the Worin shaft, GUSTAVE A' ROSENOW a gear connected therewith, an ann pivoted Titnessesz on the bracket, gears thereon and means for CLARA E. SKEELS, 10 ad3ust1ng sald arm to throw either of its H. A. DANCER. 

